code listp to determine wich os I'm running on

[Renato Pontefice]

emh....doesn't works on linux :-(

this is the F1 e result
Loading 00debian-vars...done
Loading /etc/emacs/site-start.d/50asym
ptote.el (source)...done
Loading /etc/emacs/site-start.d/50autoconf.el (source)...done
Loading /etc/emacs/site-start.d/50dictionaries-common.el (source)...
Loading debian-ispell...
Loading /var/cache/dictionaries-common/emacsen-ispell-default.el
(source)...done
Loading debian-ispell...done
Loading /var/cache/dictionaries-common/emacsen-ispell-dicts.el
(source)...done
Loading /etc/emacs/site-start.d/50dictionaries-common.el (source)...done
Loading /etc/emacs/site-start.d/50festival.el (source)...done
Loading /etc/emacs/site-start.d/50psvn.el (source)...done
Loading /etc/emacs/site-start.d/50python-docutils.el (source)...done
Loading /home/renato/Dropbox/emacs_prof/.emacs...done
For information about GNU Emacs and the GNU system, type C-h C-a.

and this is the .emacs (part of...)
;;-----------setta la directory di default (dove aprire e salvare file) su
Dropbox a seconda del s.o. con cui si apre emacs

(cond
 ((eq system-type 'windows-nt)(setq default-directory "C:/Documents and
Settings/renatop/Documenti/Dropbox/Documenti/org") )
 ((eq system-type 'darwin)     (message "Darwin"))
 ((eq system-type 'gnu/linux)  (message "č linux"))

;; ((eq system-type 'gnu/linux)  (setq default-directory
"/home/renato/Dropbox/Documenti/org"))
 (t                            (message "Unknown system")))
(message system-type)

why....:-(